Eldorado Posted January 6, 2021 #1 Share Posted January 6, 2021 Phosphorous, calcium and charcoal suggest that indigenous people learned to identify uniquely fertile soils prior to the invention of agriculture in the Amazon region, according to a University of Oregon-led team of scientists. Researchers have long theorized that pre-Columbian artifacts, signs of plant domestication and charcoal remains from controlled burns had produced rare spots of fertility in the notoriously highly acidic and nutrient-poor Amazon soil environment. However, radiocarbon dating of such fertile soil, known as Amazonian dark earth, at an often-studied basin near the confluence of the Solimoes and Negro rivers in northwest Brazil tell a different story, said Lucas Silva, a professor of environmental studies, who led the project. Full monty at the University of Oregon: Link 1 2 Link to comment Share on other sites More sharing options...
Abramelin Posted January 6, 2021 #2 Share Posted January 6, 2021 This is, of course about terra preta 2 Link to comment Share on other sites More sharing options...
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